Final answer:
Jell-O and blood are both examples of colloids, which are mixtures containing particles large enough to scatter light but small enough not to settle out quickly.
Step-by-step explanation:
Two good examples of a colloid would be Jell-O and blood. A colloid is a mixture with properties between those of a solution and a suspension, where the colloidal particles are larger molecules like proteins or groups of molecules or ions. These particles range in size from approximately 2.0 to 500 nm and are large enough to scatter light, which makes the colloid appear opaque. Blood is an excellent example because it is a complex mixture containing cells, platelets, and plasma proteins, all dispersed in a liquid medium. These components are of colloidal size and contribute to the blood's colloidal nature.